The SAZ-4500D is the largest and most powerful amplifier produced by Sundown Audio. It features a newly tooled extra wide casing to contain the massive circuit board and dual pairs of 1/0 power/ground terminals. If you need the most possible Sundown Audio power then look no further than the SAZ-4500D! This is a serious SPL competition amplifier featuring EIGHT power supply transformers and THIRTY TWO power supply MOSFETs.

This amplifier can draw HUGE amounts of current - in excess of 500 amps - you MUST have a very large high output alternator (250-300 or more amps) AND 3-4 Group-31 batteries to power this amplifier (we suggest XS Power D3100s or Stinger SP2150s). Without such electrical system upgrades the warranty is void as they are a *requirement* to run an amplifier this large. We suggest installation only by professional and/or experienced installers for this amplifier.


  • Double Sided Through Hole Epoxy PCB
  • Efficiency : 86% @ 4 ohm, at 100Hz
  • 24dB/Oct Variable Crossover
  • Multi-Way Protection Circuitry
  • (Thermal/Over Current/Speaker Short/Speaker DC Protection)
  • Variable Subsonic Filter
  • Variable Bass Boost
  • Variable Low Pass Filter
  • Variable Phase Shift
  • Dual Zero(0) Gauge Power Supply Connectors
  • Tested Voltage & THD : 12.8V & Less than 1% THD
  • Operating Voltage : DC 10V~18V (Absolute Maximum 18.5 volts)
  • Digital Class-D Linkable Mono Block Amplifier
  • 1 Ohm Stability
  • Wired Remote Controller
  • MSRP $2149 USD

Rated power output

----RMS power, 2 ohm linkable/dual mono

9000W x 1CH

----RMS power, 1 ohm mono

4500W x 1CH
----RMS power, 2 ohm mono 2000W x 1CH

----RMS power, 4 ohm mono

900W x 1CH
Signal to Noise Ratio >90dB
Low pass frequency crossover 35Hz~300Hz
Subsonic filter 10Hz~50Hz
Bass boost @ 45Hz 0~9dB
Phase shift control 0~180 degree
Frequency response 10Hz~250Hz (+/- 1dB)
T.H.D @ 4 ohm <0.1%
Efficiency @ 4 ohm 86%
Fuse rating 500A (external type fuse)
Input Sensitivity 200mV to 6V (+/- 5%)
Dimensions 12.2"(W) x 2.68"(H) x 25.59"(L)
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